McCulloch 10-10 Chainsaw Manual

The McCulloch 10-10 is a classic, professional-grade chainsaw known for its durability and power. This manual covers the operation, maintenance, and safety procedures for the McCulloch 10-10 chainsaw, including its 3.3 cubic inch (54cc) engine, automatic oiling system, manual chain brake, and anti-vibration features. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and specifications.

Features at a Glance

Key components: 3.3 cu in (54cc) two-stroke engine, 16" or 20" guide bar, automatic chain oiler, manual chain brake, anti-vibration system, solid-state ignition, and manual fuel primer.

Safety Information

Always wear proper PPE: safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toe boots.

1. Kickback Zone: Avoid contact with the upper quarter of the guide bar tip.
2. Pre-Start Check: Inspect chain tension, sharpness, and bar condition before each use.
3. Clear Work Area: Ensure no obstacles, people, or animals within 15 feet.
4. Secure Workpiece: Never cut with the saw held with one hand or above shoulder height.

WARNING! Chainsaw kickback can cause severe injury or death. Always maintain a firm grip and proper stance.

Assembly & Preparation

Unpack and inspect all parts. Assemble on a clean, flat surface.

1. Attach Guide Bar & Chain: Place bar over studs, align chain with sprocket, adjust tension.
2. Fill Fuel Tank: Use fresh gasoline mixed with 2-cycle oil at 40:1 ratio.
3. Fill Oil Tank: Use bar and chain oil (not motor oil).
4. Prime Carburetor: Press primer bulb 5-7 times until fuel is visible.

CAUTION! Fuel is highly flammable. Refuel outdoors, away from ignition sources, with engine off and cool.

Specifications

• Model: McCulloch 10-10.
• Engine Type: 2-stroke, air-cooled, single cylinder.
• Displacement: 3.3 cu in (54cc).
• Power Output: Approximately 3.5 HP.
• Fuel Capacity: 20 fl oz (0.6 L).
• Oil Capacity: 11 fl oz (0.33 L).
• Ignition: Solid-state electronic.
• Recommended Bar Length: 16" to 20".
• Chain Pitch: 0.404" or 3/8".
• Weight (Powerhead): 13.5 lbs (6.1 kg).

Controls and Components

Main Controls: Throttle trigger, throttle lockout, choke control, stop switch, primer bulb, manual oiler button.

Components: Front handle with hand guard/chain brake, rear handle, fuel tank cap, oil tank cap, spark plug cover, muffler, guide bar, chain, and sprocket cover.

Adjustments: Chain tension (via side knob), carburetor (H, L, T screws), idle speed. Safety: Chain brake engages when hand guard is pushed forward. Anti-vibration reduces operator fatigue.

Starting & Stopping Procedure

Cold Start:

1. Engage chain brake. Place saw on firm ground.
2. Set choke to FULL position. Press primer 5-7 times.
3. Pull starter rope sharply until engine 'pops'.
4. Move choke to HALF position. Pull rope to start.
5. Allow to warm up at idle for 30 seconds, then disengage brake.

Warm Start: Choke off. Pull starter rope.

Stopping: Release throttle, press STOP switch to OFF.

Tip: Always engage chain brake when starting or carrying the saw.

Operation & Cutting Techniques

Supports felling, limbing, bucking, and pruning.

1. Felling: Plan escape path. Make notch cut, then back cut. Use wedges if needed.
2. Limbing: Cut branches from bottom to top, using the saw's weight.
3. Bucking: Support log. Cut from top down, avoiding ground contact.
4. Pruning: Use light touch; avoid pinching the bar.

WARNING! Do not cut with the tip. Be aware of kickback. Never operate above shoulder height or with one hand.

Maintenance Schedule

Daily/Before Use: Check chain tension & sharpness, check fuel/oil levels, inspect bar for wear, clean air filter.

Weekly/10 Hours: Clean spark arrestor screen, check spark plug condition, clean cooling fins, inspect anti-vibration mounts.

Monthly/50 Hours: Replace spark plug, clean fuel filter, check carburetor adjustment, inspect clutch and sprocket.

Annually/Storage: Drain fuel system, clean entire saw, lubricate clutch bearing, inspect all components.

Chain Sharpening & Tensioning

Proper chain maintenance is critical for safety and performance.

1. Tensioning: Loosen bar nuts. Adjust tensioning screw until chain snaps back when pulled from bar. Tighten nuts.
2. Sharpening: Use round file matching chain pitch (e.g., 7/32" for 0.404"). File each cutter at 30° angle. Maintain equal length on all cutters.
3. Depth Gauge: File depth gauges (rakers) to 0.025" below cutter top.

CAUTION! Wear gloves. Secure bar. A loose or dull chain increases kickback risk.

Storage Guidelines

For long-term storage (over 30 days):

1. Drain fuel tank and run engine until it stops to clear carburetor.
2. Drain bar and chain oil tank.
3. Remove chain, clean in solvent, dry, and coat with oil.
4. Clean entire saw, especially cooling fins and air filter.
5. Store in a dry, cool place, covered to prevent dust.

CAUTION! Old fuel can gum up carburetor. Always use fuel stabilizer or drain system.

Troubleshooting

Service: For technical support or parts, contact McCulloch customer service or visit authorized service centers.